Ahhh ... I don't think they actually check for age. I was maybe 21 when I went to my first WCES and they never checked me FWIW.
It's really an eyeopener for sure. A good experience to do at least once. If you aren't into the thought of checking out a porn convention ... then stay away because it's all that you think it is and then some.
Just don't do what I did.
You see, you can pick up free heavy duty plastic carrying bags for all your freebies, mags, flyers, promos etc. Usually they all have huge colorful logos on 'em to make it worth their while. I picked up one from the Adult Convention to carry around some of the "flyers" that I picked up there. Wow, I though I was gonna get arrested walking out of the Hilton with them the material was so over the top.
Anyways, the plastic bag I got had some huge logo of an adult vid company. Like Vivid Video or something like that. I didn't really think much about it at that time. I walked around the high-end audio exhibits with this bag and I was getting funny looks here and there because they all knew where I had previously been. In hindsight I should have chosen another bag. 😀
Hey, if you have these connections you should definitely use them to get introduced to the product showgirls and get a date or something! You've never seen so much silicon short of a strip bar.
Keep also in mind that when Vegas is totally full like it is for WCES weekend then you're gonna have to wait for seating for eating and such. You may want to change your eating times to reflect this. Not much sucks more than having to wait for food when you're hungry.